Considering the heavy quark limit and chiral symmetry, one can construct the effective interactions for bottom mesons and pesudoscalar mesons, which are [1]}, [2]}, [3]}, [4]}, [5]}, [6]},
\(\mathcal {L}&=&-ig_{B^\ast B \mathcal {P}}\Big (B^{i\dagger } \partial ^\mu \mathcal {P}_{ij}B^{\ast j}_\mu -B^{\ast i\dagger }_\mu \partial ^\mu \mathcal {P}_{ij}B^{j}\Big )\nonumber \\&&+\frac{1}{2}g_{B^\ast B^\ast \mathcal {P}}\epsilon _{\mu \nu \alpha \beta }B^{\ast \mu \dagger }_i \partial ^\nu \mathcal {P}_{ij}{\stackrel{\leftrightarrow }{\partial ^\alpha }}B^{\ast \beta }_j,\) 
